#all{
    width:980px;
    margin: 0 auto;
}
#body_head{
    width:980px;
    height:100px;
}
#body_body{
    width:980px;
    height:600px;
}
#body_left{
    width:200px;
    height:580px;
    float:left;
}
#body_right{
    margin-left: 15px;
    width:750px;
    height:600px;
    float:left;
}
#foot{
    width:980px;
    height:20px;
}